The invention discloses an end-to-end data transmission delay measuring method facing to the intelligent self-sensing optical network application. Through the method of transmitting a detecting pack on the source node, and returning the detecting pack on the destination node along the original route, the data transmission delay between each optical network node is measured. The invention is suitable in the grouping self-sensing optical network. The end-to-end data transmission delay measuring method in the self-sensing optical network has the following advantages and effect: solving the problems of the chain transmission parameter measurement in the optical network, as one of the premise and the basis, establishing the basis for the implement of the self-sensing optical network.